Mechanical properties and flame retardancy of surface modified magnesium oxysulfate (5Mg(OH)2*MgSO4*3H2O) whisker for polypropylene composites

Title
Mechanical properties and flame retardancy of surface modified magnesium oxysulfate (5Mg(OH)2*MgSO4*3H2O) whisker for polypropylene composites
Authors
김수현Eui-Su KimYe Chan KimJungwoo ParkYoungjun KimSung-Hoon KimKwang Jin KimJonghwan SuhrYoungkwan LeeSeong Hoon LeeDae-Sik KimJu-Ho YunIn-Kyung ParkJae-Do Nam
Issue Date
2018-06
Publisher
Journal of Materiomics
Citation
VOL 4, NO 2-156
Abstract
Magnesium oxysulfate (MOS) whisker is considered as a promising inorganic material recently attracting a great attention for being used as a reinforcing filler for polymer composites due to high aspect ratio and extremely-low bulk density. In this study, the MOS was treated with 3-methacryloyloxypropyl-trimethoxy silane (MPS) via sol-gel condensation reactions, which successfully allowed melt mixing with polypropylene (PP) up to 30  wt% of MOS. The tensile strength at yield and modulus of the MOS/PP composites were substantially increased by 50.8% and 362%, respectively, when compared with the pristine PP. As a novel finding, the flame retardancy of MOS was proved by identifying water evolution at elevated temperatures giving out 9  wt% of water in 250– 320  °C and 14  wt% in 350– 420  °C in two steps. This work demonstrated that the MOS could be an excellent filler for PP not only increasing the mechanical properties in a great extent but also imposing flame retarding capability.
URI
http://pubs.kist.re.kr/handle/201004/69472
ISSN
2352-8478
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KIST Publication > Article
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